*, *:before, *:after {
    -moz-box-sizing: border-box;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
  }
  
  html {
    font-family: Helvetica, Arial, sans-serif;
    font-size: 100%;
  }
  
  #page-wrapper {
    width: 420px;
    background: #ffffff;
    padding: 1em;
    margin: 1em auto;
    border-top: 5px solid #69c773;
    box-shadow: 0 2px 10px rgba(0,0,0,0.8);
  }
  
  div#switch{
    display: flex;
  }
  div#switch:hover{
    cursor: pointer;
  }

  #msg {
    font-size: 0.9em;
    line-height: 1.4em;
  }
  
  #msg.not-supported strong {
    color: #CC0000;
  }

  select{
    display: block;
    width: calc(100% - 50px);
    margin-left: 50px;
  }
  input[type="range"] {
    display: block;
    width: calc(100% - 50px);
    margin-left: 50px;
  }
  label {
    float: left;
    width: 50px;
  }
  
  .option {
    margin: 1em 0;
  }
  
  button {
    display: inline-block;
    border-radius: 3px;
    border: none;
    font-size: 0.9rem;
    padding: 0.5rem 0.8em;
    background: #69c773;
    border-bottom: 1px solid #498b50;
    color: white;
    -webkit-font-smoothing: antialiased;
    font-weight: bold;
    margin: 0;
    width: 100%;
    text-align: center;
  }
  
  button:hover, button:focus {
    opacity: 0.75;
    cursor: pointer;
  }
  
  button:active {
    opacity: 1;
    box-shadow: 0 -3px 10px rgba(0, 0, 0, 0.1) inset;
  }